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<head><meta charset="utf-8"><title>Leftover errors · t-compiler/help · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/index.html">t-compiler/help</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/topic/Leftover.20errors.html">Leftover errors</a></h3>

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<a name="243305975"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/182449-t-compiler/help/topic/Leftover%20errors/near/243305975" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> ruster <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/topic/Leftover.20errors.html#243305975">(Jun 20 2021 at 14:45)</a>:</h4>
<p><a href="https://github.com/rust-lang/rust/blob/master/compiler/rustc_error_codes/src/error_codes/E0001.md">https://github.com/rust-lang/rust/blob/master/compiler/rustc_error_codes/src/error_codes/E0001.md</a></p>
<blockquote>
<p>Note: this error code is no longer emitted by the compiler.</p>
</blockquote>
<p>Then why is it still there?</p>



<a name="243322493"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/182449-t-compiler/help/topic/Leftover%20errors/near/243322493" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Taylor Yu [they/she] <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/topic/Leftover.20errors.html#243322493">(Jun 20 2021 at 21:28)</a>:</h4>
<p>maybe so it can still be found on the web page if it's emitted by an older version of the compiler?</p>



<a name="243323702"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/182449-t-compiler/help/topic/Leftover%20errors/near/243323702" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> bjorn3 <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/topic/Leftover.20errors.html#243323702">(Jun 20 2021 at 21:57)</a>:</h4>
<p>Yeah, I believe that is the reason old error codes are kept.</p>



<a name="243323826"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/182449-t-compiler/help/topic/Leftover%20errors/near/243323826" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Taylor Yu [they/she] <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/topic/Leftover.20errors.html#243323826">(Jun 20 2021 at 22:00)</a>:</h4>
<p>i also think the rendered explanations at <a href="https://doc.rust-lang.org/error-index.html">https://doc.rust-lang.org/error-index.html</a> aren't easy enough to discover, but that's a set of related issues</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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